Crusher.



F. A. WALD.

CRUSHER.

APPLICATION man OCT. 9, 1914.

1,170,370. Patented Feb. 1916.

E lwald p FRANK A. WALD, OF EAST BERLIN, CONNECTICUT.

Specification of Letters Patent.

Patented Feb. 1 1916.

Application filed. October 9, 1914. Seria1 No.'865,928.

To all whom it may concern:

Be it known that I, FRANK A. WALD, a citizen of the United States, residing at East Berlin, in the county of Hartford and State of Connecticut have invented certain new and useful Improvements in Crushers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to ore and stone crushers of the rotary type and more particularly to the hammers used in such machines.

The invention has for its object to provide a hammer for crushers which may be quickly and conveniently attached and detached and adjusted from time to time on the hammer arm to insure maximum cutting efliciency.

With this and otherobjects in View, the invention consists in the novel construction, arrangement and formation of parts as will be hereinafter specifically described, claimed and illustrated in the accompanying drawing, in which:

Figure 1 represents a fragmental View, partly in section, of a rotary crusher, showing the improved hammer applied thereto. Fig. 2 represents a longitudinal sectional View through one of the hammers and hammer arms removed, and Fig.,3 represents a transverse sectional view on the line 3-3 of Fig. 2.

Referring to the drawing in detail, wherein similar reference numerals designate corresponding parts throughout the several views, the numeral 5 indicates generally the body of the machine having the usual crushing chamber 6 in which is mounted a shaft 7 carrying one or more disks or wheels 8. Each wheel 8 is provided with a plurality of openings in which disks 9 are adjustably secured and carry eccentrically disposed pins or shafts '10 on which are pivotally mounted in the inner extremities of thehammer arms 11.

The outer extremities of the arms 11 are preferably rectangular in cross section and tapered outwardly, as clearly illustrated in Fi 2, and are received within the recessed en 12 of hammers 13. The inner faces of the recesses in the ends '12 of the hammers are preferably inclined conformably with the faces of the hammer arms 11 so as to insure the arms to be wedged into the ends of the hammers. Each of the rectangular walls 12 of the recessed end of the hammer 13 is forinedwith an opening 1 1 adapted'to be brought into registration with an opening 15 formed transversely and at right angles to the axis of the wheel or disk 8 through the outer end of each hammer armll. A wedge 16 is adapted to be positioned through one pair of the openings 14 and the opening 15 to secure the hammer 13 in operative position, andthe wedge is preferably so arranged, with relation to the direction of travel of the disks 8, as to prevent the wedge from being accidentally removed by flying chips of stone or the like. The wedge 16 is formed in one face with a longitudinal groove or channel 17 formed with a plurality of notches 18. A lockingmember 19 ispositioned within the groove 17 and is formed with an inwardly directed end 20 adapted to engage within one of the notches 18 to prevent relative longitudinal movement of the member 19 and the wedge 16. The opposite or outer end of the member 19 is bent angularly, as indicated at 21, and against the side face of the end 12 of the hammer to further insure against the accidental loss of the wedge and consequent removal of the hammer.

In use, as the cutting edge of each of the hammers 13 is gradually worn away and dulled and the end thereof assumes a convex shape, as indicated by the dotted line 22 in Fig. 1, it is obvious that the efficiency of the machine is seriously impaired. With my improved hammer, the same may be-removed r from the hammer arm, turned a quarter of a revolution relative thereto and secured in adjusted position by the wedge 16 so as to present .a new and sharp cutting edge for use. It will be understood that the hammers may be removed and adjusted from time to time so as to present a cutting edge each time the hammer is adjusted untilthe same is completely worn away.

What I claim is: y

1. In a rotary crusher, ajhammen arm having ,an aperture in its outer end, .a hammer having a recess in one end removably receiving the apertured end of said arm, the walls of said recess having a plurality of apertures therein adapted to register with the aperture in said arm, a wedge removably positioned through several of the apertures in said hammer and through the aperture in said arm, and a locking member engaged in each of the side walls of said recess adapted to be moved into registration with the transverse opening insaid hammer arm, and means movably positioned through the epitome openings 1n said hammer arm and said hammar for Securing the latter in position to present any one of the four cutting edges for use.

In testimony whereof I aifix my signature in presence of two witnesses.

FRANK A. WALD. Witnesses S. E. RoBms, R. N. ROBINS. 

